In Power Automate HTTP action beginner tutorial you will learn :
Complete basic operations using SharePoint REST endpoints
https://docs.microsoft.com/en-us/sharepoint/dev/sp-add-ins/complete-basic-operations-using-sharepoint-rest-endpoints
Graph Explorer
https://developer.microsoft.com/en-us/graph/graph-explorer
Alpha Vantage API Documentation
https://rapidapi.com/alphavantage/api/alpha-vantage